Improvement in sewing-machine attachments for making button-holes



3 Sheets--Sheet i.

l. F. HASKINS.

-Machine Attachments for Makin Holes g Button Sewing Patented Dec. 30,i873.

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3 Sheets--Sheet 2.

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Sewing-Machine Attahlments for Making Button o es.

NO. 146,000, Patented De.30,l873.

. .3Sheets-Sheet3.` J. F. HASKINS. Sewing-Machine Attaiczh'ments forMaking Bnutton n es.

No. 146,000, Patentednwsonss..

UNTTED STATES PATENT DFFICE.

JOHN F. HASKINS, OF FITCHBURG, MASSACHUSETTS.

' IMPROVEMENT IN SEWING-MACHINE ATTACHMENTS FOR MAKING BUTTON-HOLES.

Specification forming part of Letters Patent No. 146,000, dated December30, 1873; application filed September 11, 1873.

To all whom t may conce/rny Be it known that I, JOHN F. HAsKINs, ofFitchburg, Massachusetts, have invented certain Improvements inAttachments to Sewing- Machines for Making Button-Holes, of which thefollowing is a specification:

My invention is an improvement upon the Howard and Jackson attachment,described in Letters Patent No. 103,745, dated May 31, 1870. In thatattachment, when the looper is drawn up, the upper part of the thread a,forming the loop, is almost directly above the lower part b, asillustrated in the diagram, Fig. 14. The upper part of this thread amust be caught by the end of the nger E, and there is much practicalditicultyin so regulating the motion of finger E that there will be nodanger of its catching both these threads, and yet make it certain tocatch thread a, for the end of nger E must move back far enough to getbehind thread a; but if it moves even a very little more than this,there is great danger of its catching thread b as well.

The rst part of my invention relates to this practical diiculty, andconsists in so changing the relative positions of threads a and b at thetime the linger moves back that the inger E may be thrown well back, andthus make it certain to catch thread a without dangerof its catchingthread b. This is accomplished by giving the looper a motion on its axisin addition to its reciprocating motion, which carries the thread atoward and the thread b from the path of the end of the finger E. Themechanical means used for effecting this are so simple that they will beclearly understood from the drawings without further description. (SeeFigures 1 and 2.)

The second part of my invention relates to the method of actuating thefinger E, and consists in substituting a pin, y, and cam-slots for thepins, stops, cams, and catch used in the Howard and Jackson attachmentas now constructed.

On reference to Figs. 3, 4., and 5, it will be seen that, during thetime the sewing-needle is in the fabric, the pin y is in the concentricportion of the slot- U, and the linger does not move; but when thesewing-needle has risen and the thread-catcher has moved upward andrevolved, the pin y moves into and through the slot X, and thus throwsthe iinger E back past the end of the thread-catcher, so as to catch thethread. At the end of the slot the pin y rides over the bolt L, movingagainst the spring I, and, passing it, is prevented by the bolt frompassing back through the slot X, as this cam turns in the oppositedirection, and is forced into and through the slot W, thus throwingforward the finger E over the face of the cam K to the other side of thesewingneedle, where it remains until the needle has gone through itsloop, when it is thrown back out of the way by striking the incline ofthe slot at V, which throws it into its original position.

The third part of my invention is an improvement in the bed-plate of theattachment.

In the Howard and Jackson attachment all the parts are attached to abed-plate, which is securedin the desired position by meansofset-screws; but when it is removed, it is difcult for an unskillfulperson to replace it and readjust it with the necessary accuracy. Myinvention consists in making the bed-plate in two portions, onedetachable from or moving on the other, so that while one part is alwaysiirmly attached to the overhanging arm, the other part may be readilyput and kept out of the way, and when replaced will invariably assumeand be held in its former position without requiring adjustment. Ieffect this by making the bed-plate in two parts, C and D, which can beiitted together and brought up snug in the same relative position eachtime by means of a pin, wedge, or screw. In the attachment shown in thedrawings, a tapering thumb-screw is used, and thus the movable part ofthe bed-plate is brought into. the desired position in relation to thefixed part without affecting the adjustment of the fixed part. When thescrew has been taken out, the movable part may be swung back and anotherhole in the movable part brought opposite the holes in the xed part D,so that by putting in the screw again the attachment is kept out of theway. The xed part is adjusted by setscrews, in the usual way, and neednever be separated from the sewing-machine. By this means the attachmentis easily put out of the way or replaced, and when replaced is always inposition. Instead of swinging the movable part, the hinge may bedispensed with, and the lower part C of the bed-plate with theattachment removed Wholly from the machine or placed as shown.

Vliat I claim as my invention is- 1. The improved looper, having an eyeinV which it receives the needle and retains the thread, and having amotion on its axis in addition toits reciprocating motion7 as specified.2. The finger E, in combination With the pin y and cam, substantially asdescribed.

3. The compound bed-plate, made in two parts, C and D, combined togethersubstantially as described.

4. The compound thread-catcher and its' JOHN F. HASKINS.

Witnesses: l

FRED. FosDIoK, J. E. Monsn.

